Rasp or file



v. E. vI r-:HTO

RASP OR FILE Dec. 23, 1930.

Filed Jan. 16, 1929 vhaving an undercut Igroove or overhanging PatentedDec. 23, 1930 ENT OFFICE vAINo EML LErrTo, l0F EVANSVILLE, yINDIANA RAS?on FILE l Application led January 16, 1929. Serial No. 332,929.'

Rasps or files inthe course of time become worn and lose theireectiveness.

The object of my invention is to provide an improved rasp or file havingremovable and interchangeable teeth, thereby enabling the user to removeany tooth which becomes worn or damaged and to replace any or all of theteeth with others and also permitting the same holder to be employed forteeth of different kinds or sizes.

The invention embodies a backing or holder lips, independent teeth,removably engaged withthe undercut groove or overhanging lips,

and locking means for holding the teeth against displacement.

lDiderent kinds of teeth may be used in Vthe same holder at differenttimes, enabling the tool to be changed from a rasp to a `file orvice-versa.

The contour ofthe teeth may be straight or arcuate or the teeth mayextend directly cross-wise, or diagonally, in relation to the flengthofthe holder.

As shown and described, the holder, which is provided with any suitablehandle or tang,

V has a dove-tail groove running lengthwise vit will be understood thatother V thereof'but itv will be understood that overhanging lips of anykind may be used in `lieu Vof a dove-tail groove. For convenience andcheapness of manufacture, the groove may extend through the outer end ofthe holder and said end be permanently closed by a piece or abutmentVpermanently riveted to the backing and at the other end of the holder,a

. v cross-wedge employedto crowd the independent and removable teethtogether to tightly hold them in the groove under the lips, but A meansmay be employed for that'purpose. y lIn the accompanying drawings Figure1 is a plan view ;v y K Fig. 2 is a longitudinal section through the lholder, the teeth being shown in full lines;

= Figrfis a plan viewof Vthe holder, the

[f wedge vand teeth `being omitted;

, Fig. 4 is a cross section `through the holder, showingak tooth in fulllines; and

, F ig. 5 is an end view of a tooth.

- `l "The -holder lis' provided with longitudinally extending lips 2 forengaging the removable teeth'. Preferably, the lips are formed byproviding a dove-tail seat 3. For convenience and cheapness ofmanufacture, the seatfis formed by cutting. inwardly from the outer endofthe holder; therefore, there is provided an abutment plate or strip 4which is suitably secured at 5, as by rivets for instance, which closesthe outer end of the seat 3.

Extending cross-wise of the inner end of the seat 3, is a tapered crossgroove 6 which is adapted to receive a wedge 7 which is driven into saidgroove 6 for the purpose of holding the removable teeth 8 crowdedagainst the abutment 4 when said teeth have their ends engaged under thelips 2.

The removable teeth may be of any shape desired and their lengths mayextend directly cross-wise of the holder or at an inclination thereto.The teeth may have straight crests or cutting edges or they may bearcuate, as with a half round file or rasp. The teeth may be of anydegree of fineness or coarseness. Each tooth has a body 9 whose ends fitunder the lips 2 and when the seat 3 is of the dovetail form disclosed,these bodies 9 are of dovetail form to fit the seat and project underthe lips 2. The teeth have their ends 10 overlying the lips 2 so thatthe teeth extend the full width of the holder 1.

The tang or handle 11 may be of any desired shape but, as shown, it isoffset from the plane of the holder 1 so that it may be readilygraspedgwithout danger of the knuck- ,les or fingers of the user comingin Contact vrreached. Obviously, teeth of any inclination,

size, or shape, may be used in the holder 1.

1 removable teeth {whosefbodies 1 are received' What I claim is: 1

A rasp or ile comprising a seat extending lengthwise thereof providedAat its outer end .with ani attached abutment i and 'at its inner endwith a cross groove tapered from one end to its other end and openingout through both sides of the holder,

" in the Seat and which are of lesser width than the cross groove sothat their bodies may be a insertedin'said cross groovefor introductioninto the seat, or, for removal from said seat,

and a removable wedge driven into said cross groove for holding thebodies of the teeth in the Isaid seat, sai-d wedge having its outerkface lying below the teeth to prevent inter-A ference with the teethwhenthe rasp or le is in usev and to prevent injury to the hands Y of theuser. l Y Y Intestimony whereof I affixmysignature. Y'

' VAINO EMIL L EHTO.

a holder havingVV

